The fifth annual Long Island Fleece and Fiber Fair will take place Saturday and Sunday, May 17 and 18, at Hallockville Museum Farm. The event, co-sponsored by Long Island Livestock Company, will feature demonstrations of fiber arts and related processes, other folk arts and a “fiber market” in the Naugles Barn. Special activities will include sheep herding, a llama obstacle course and shearing demonstrations.

• A 66th anniversary open house will take place at the Old Town Arts and Crafts Guild on Main Road in Cutchogue Saturday, May 17, from 10 a.m. to 5 p.m. and Sunday, May 18, from noon to 5 p.m. Fine art, photography and handcrafted items by local artists will be on exhibit and for sale. Complimentary refreshments will be served.

• Artist and animator Don Duga is celebrating the 50th anniversary of their 1964 “U.S. Invasion” with a Beatles art exhibit and sale throughout May at JC’s Cafe and Lounge on East Main Street in Riverhead. Mr. Duga will be present at the restaurant Saturday, May 17, from 1 to 3 p.m.

• East End Arts will host a special art show, ‘Here Comes the Sun,’ at Remsenburg Academy from May 16 to June 1. A reception is set for Friday, May 23, from 5 to 7 p.m. Artwork will be available for purchase.

Participating artists are figurative painters Lucille Berril Paulsen of Water Mill and Linda Capello of Sag Harbor, photographer Michael McLaughlin of Riverhead, sculptor/mixed-media artist Jonathan Pearlman of East Quogue and painter Leo Revi of East Hampton. All are East End Arts members.

• This year’s East End Challenge presented by the East End Seaport Museum in Greenport will open with a reception at 5 p.m. Saturday, May 17. For the exhibit, East End high school students submitted projects on the theme ‘The Littoral Zone: Mutability and Mystery’ that explored the intersection of science, engineering and art. Winners will be honored at the reception. The show will also celebrate the opening of the museum’s season.

The littoral zone includes everything below the “top of the tide,” including wetlands, estuaries, barrier islands, tidal marshes, beaches and dunes, out to the ocean.